October NY world sugar #11 (SBV25) today is down -0.11 (-0.71%), and December London ICE white sugar #5 (SWZ25) is down -3.30 (-0.72%). Sugar prices are sliding today, with London sugar posting a new 4-year low.   Sugar prices have been sliding over the past six months, with NY sugar slumping to a 4.25-year nearest-futures low last Thursday on ramped-up sugar production in Brazil.  Last Wednesday, Unica reported that Brazil's Center-South sugar output in the second half of August rose by +18% y/y to 3.872 ...